30e.1 Using new molecular techniques, scientists are discovering more about bacteria.
- A Natural Picture of the Biological World.
The extent of bacterial diversity is just now being understood with the construction of phylogenies and the discovery of new species.
30e.2 The different types of extremophiles have different modifications that allow them to thrive in particular extremes.
- Life at High Temperatures. Thermophiles have molecules and cell membranes that retain their stability at high temperatures.
- Life at Low Temperatures and Extreme pH Levels. The molecules and membranes of psychrophiles are designed to maximize flexibility. Extremophiles that grow best at pH extremes keep a neutral pH within their cells.
- Life in a Brine and Other Environments. Halophiles must keep a balance between the solute concentration inside their cells and their salty environment. Barophiles and radiation-resistant bacteria also have unique specializations.
30e.3 Continued study of extremophiles and bacterial diversity will lead to more discoveries.
- Extremophiles in the Evolution of Life. Studies of the genetics and diversity of extremophiles may reveal more of their unique properties and characteristics of early Earth.